波折腹板钢梁柱弱轴方向半刚性连接节点性能研究

发布时间：2018-01-12 21:11

本文关键词：波折腹板钢梁柱弱轴方向半刚性连接节点性能研究　出处：《河北工程大学》2017年硕士论文　论文类型：学位论文

【摘要】：在高层、大跨结构中,钢结构具有突出的优越性。随着梁高厚比的增大,腹板平面外刚度较小,易发生局部屈曲,波折腹板具有较大的平面外刚度,波折腹板梁抗剪屈曲承载力较大,有较好的经济效益及应用前景。关于波折腹板钢梁柱半刚性连接节点的研究主要集中于强轴方向,弱轴方向的研究并不多见。弱轴方向的连接是整个钢框架节点的重要组成部分,其性能影响结构的整体性能,在进行空间框架的高等分析时,必须考虑弱轴方向的受力性能,因此有必要对弱轴方向的连接性能进行研究。本文选用波折腹板钢梁柱弱轴方向外伸端板半刚性连接,首先运用ANSYS软件分别对边柱及中柱节点在单向加载下进行数值模拟,得到节点的弯矩-转角曲线,分析节点的受力特性。通过调整波折腹板高度、波折腹板厚度、端板厚度、抗滑移系数及螺栓直径等参数,分析其对节点弯矩-转角曲线的影响。研究边柱及中柱节点在循环荷载下的滞回性能,得到滞回曲线,分析波折腹板高度、波折腹板厚度、端板厚度、抗滑移系数及螺栓直径等参数对边柱节点滞回性能的影响。通过分析得出:加载初期,边柱及中柱节点BASE试件弯矩-转角基本呈线性关系,当弯矩增大到一定程度时,弯矩-转角关系开始呈非线性变化,随着弯矩的继续增大,连接的刚度明显降低,其后节点达到极限状态,连接宣告破坏。边柱及中柱节点BASE模型的滞回环稳定饱满,呈梭形且耗能系数都大于2,抗震性能较好且中柱节点BASE模型耗能能力更好。随着波折腹板高度、波折腹板厚度、端板厚度的增加,边柱连接节点的极限弯矩逐渐增大,但耗能系数逐渐减小;随着螺栓直径的增加,边柱连接节点的极限弯矩随之增加,但耗能系数先增大后减小;抗滑移系数对边柱节点的极限弯矩及耗能能力影响较小。
[Abstract]:In high-rise and long-span structures, steel structure has outstanding advantages. With the increase of beam height and thickness ratio, the external stiffness of web is smaller, local buckling is easy to occur, and the corrugated web has larger out-of-plane stiffness. The shear buckling capacity of the corrugated web beam is large and has good economic benefit and application prospect. The research on the semi-rigid connection joint of the corrugated web plate steel Liang Zhu is mainly focused on the direction of the strong axis. The connection of weak axis direction is an important part of the whole steel frame joint, and its performance affects the overall performance of the structure, in the advanced analysis of the spatial frame. The mechanical behavior of weak axis must be considered, so it is necessary to study the connection performance of weak axis. In this paper, the semi-rigid connection of extended end plate in the direction of weak axis of Liang Zhu corrugated web steel is selected. At first, ANSYS software is used to simulate the joints of side column and middle column respectively under unidirectional loading. The moment-angle curve of the joints is obtained, and the stress characteristics of the joints are analyzed. The height of the corrugated web is adjusted by adjusting the height of the corrugated web. The influence of the parameters such as the thickness of corrugated web plate, the thickness of end plate, the anti-slip coefficient and the diameter of bolt on the moment rotation curve of joints is analyzed. The hysteretic behavior of the joints of side column and middle column under cyclic load is studied. The hysteretic curve is obtained, and the effects of the height of the corrugated web, the thickness of the corrugated web, the thickness of the end plate, the slip resistance coefficient and the diameter of the bolt on the hysteretic performance of the edge column joints are analyzed. When the moment increases to a certain extent, the relationship between moment and rotation begins to be nonlinear, and increases with the increase of bending moment. 3. The relationship between moment and rotation angle of BASE specimen is linear, and when the moment increases to a certain extent, the relationship between moment and rotation angle begins to change nonlinearly, and increases with the increase of bending moment. The stiffness of the connection is obviously reduced, the joint reaches the limit state, and the connection is declared to be destroyed. The hysteretic loop of the BASE model of the side column and the middle column is stable and full, with fusiform shape and energy dissipation coefficient greater than 2. With the height of the corrugated web, the thickness of the corrugated web and the thickness of the end plate, the ultimate bending moment increases gradually. But the energy dissipation coefficient decreases gradually. With the increase of bolt diameter, the ultimate bending moment increases, but the energy dissipation coefficient increases first and then decreases. The slip resistance coefficient has little effect on the ultimate bending moment and energy dissipation capacity of the side column joints.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU391

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